ALLTRA CUTTING SYSTEMS

	Alltra Corporation, which is located in north central Oklahoma, builds small to large gantry cutting systems which are known for their quality. Systems are equipped to meet customer applications. Options are available from scribe systems to beveling systems. Call and find out why more shops choose Alltra for their cutting needs.
	Also see Retro Systems and AKS cutting systems.

Gantry Frame

ALLtra machines feature a gantry bridge frame traveling on a floor-mounted rack and pinion drive rail system. The gantry, comprised of two machined end-trucks which support the main cross axis beam and deck, provides the platform for the precision shape cutting processes. All components are of modular welded steel construction with machined mounting surfaces, and are bolted together to form a ridged machine frame. This proven design is the most rugged and accurate for heavy duty shape cutting and high speed positioning.
The trucks, each equipped with its individual drive unit, provides the motion along the x-axis. The double drive also prevents lagging which could occur with a slave truck that is free running or mechanically coupled by an axle. Two steel wheels located in each truck assembly ride the machined top surface of the machine rails. A pair of side-guide rollers at each end of the master (L.H.) drive truck straddle the rail contacting the machined sides for accurate guidance. An air blast nozzle located at each end of the truck removes dirt loosened by the wheel and rail scrapers.

The main cross axis beam supports the cutting stations and the cross axis servo drive system. Two rectangular bars are mounted on the beam, forming the linear ways for the cross axis carriages and support for the drive rack. The rear deck which spans the trucks also provides a frame on which several machine components are mounted such as the relay cabinet, powertrack and the gas regulator/control unit, and in some instances, satellite equipment like the plumbing boxes used with plasma systems.
Rail System

Support for the machine and longitudinal (lengthwise) travel is accomplished on elevator type rails. The machined surfaces of the rails provide smooth, even tracking for sure accuracy. The floor mounted rails are supported by heavy duty leveling pads featuring forged steel clips for fastening the rail to the pad and integrated adjusters for aligning the machine rail in all directions. The ends of each rail section are machined with a tongue and grove, providing positive rail alignment.

The pads allow for fast and easy alignment of the machine rails. However, because the straightness of the rails determine the linear accuracy of the machine, it is imperative that the rail system be properly set up before machine installation is initiated.

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